Final diagnosis


Corynesporiose (Corynespora cassiicola)

Plusieurs petites taches brunes et nécrotiques recouvrent partiellement ces folioles de tomate entraînant localement leur jaunissement. <i>Corynespora cassiicola</i> (corynesporiose)
Des petites lésions humides apparaissent sur les folioles, et se développent radialement, en prenant une teinte brune. Elles sont parfois délimitées par les nervures. <i>Corynespora cassiicola</i> (corynesporiose)
On this tomato leaflet, evolved spots are rather circular and surrounded by a clearly visible yellow halo, they show concentric patterns reminiscent of those of a target. <i>Corynespora cassiicola</i> (corynesporiosis)
On this tomato leaflet, the spots are extensive, confluent in places, and necrotic. The concentric patterns are clearly visible. <i>Corynespora cassiicola</i> (corynesporiosis)
Detail of concentric patterns on a spot of corynesporiosis observed on the upper side of the lamina of a tomato leaf. <i>Corynespora cassiicola</i>
Detail of concentric patterns on a spot of corynesporiosis observed on the underside of the lamina of a tomato leaf. <i>Corynespora cassiicola</i>
Numerous small, brownish, elongated, necrotic lesions dot this tomato stem. <i><b>Corynespora cassiicola</b></i> (corynesporiosis)
Detail of several brown, elliptical lesions formed on a tomato petiole. <i><b>Corynespora cassiicola</i></b> (corynesporiosis).
Extensive, blackish, elongated lesion on tomato apex. <i><b>Corynespora cassiicola</i></b> (corynesporiosis)
Detail of moist, blackish lesions on the sepals of a tomato flower. <i>Corynespora cassiicola</i> (corynesporiosis)
Small dark brown and necrotic lesions on green tomato fruit. Note that some are split down the center.<i>Corynespora cassiicola</i> (corynesporiosis)
Corynespora-Concombre3
Numerous chlorotic, sometimes necrotic spots dot the leaves of this cucumber plant. Note that the lower leaves are more affected and partially yellowing. <i>Corynespora cassiicola</i> (corynesporiosis)
Corynespora-Concombre-TCHA
Note that the lesions are very often delimited by the leaf veins on cucumber. They also have a discreet chlorotic halo. <i><b>Corynespora cassiicola</b></i> (corynesporiosis)
Wet spots more or less developed and necrotic observed on the upper side of the lamina of a cucumber leaf. The central part of some spots gradually splits. <i>Corynespora cassiicola</i> (corynesporiosis)
Details of leaf lesions observed on the upper side of the blade on cucumber. The tissues are more fatty around the periphery of the spots. <i>Corynespora cassiicola</i> (corynesporiosis)
Many small angular spots cover the blade of this cucumber leaf (upper side). <i><b>Corynespora cassiicola</b></i> (corynesporiosis)
A few beige to brownish angular spots have formed on this cucumber leaf. <b><i>Corynespora cassiicola</b></i> (corynesporiose
Many spots have converged on the blade of this cucumber leaf, causing necrosis and drying of sections of the blade. <i>Corynespora cassiicola</i> (corynesporiosis)
Concentric patterns are visible in places on this cucumber leaf with advanced lesions. <i><b>Corynespora cassiicola</b></i> (corynesporiosis)
Wet spots more or less developed observed on the underside of the blade of a cucumber leaf. The youngest lesions are rather moist, the oldest turn brown and become necrotic. The central part of some spots gradually splits. <i>Corynespora cassiicola</i> (corynesporiosis)
Corynespora-Concombre7
Haricot
The brown and necrotic leaf spots are localized inside the leaf blade of the bean, but also at the edge. <i>Corynespora cassiicola</i> (corynesporiosis)
Brown and necrotic spots are clearly visible on several leaves of this bean stalk. <i>Corynespora cassiicola</i> (corynesporiosis)
Young lesions are greasy, reddish-brown in color; a discreet halo sometimes surrounds them. They gradually necrotize as they evolve. <i><b>Corynespora cassiicola</i></b> (corynesporiosis)
At the end of development, the central tissues of certain leaf spots on beans split and eventually fall off. <i>Corynespora cassiicola</i> (corynesporiosis)
Advanced leaf spots on bean leaves. They are rather circular, beige to light brown or even reddish brown, and show well-marked concentric patterns. <i>Corynespora cassiicola</i> (corynesporiosis)
Advanced leaf spots on bean leaves. Note the well marked concentric patterns. <i><b>Corynespora cassiicola</b></i> (corynesporiosis)
Appearance of necrotic lesions observed on the underside of a bean leaf. <i>Corynespora cassiicola</i> (corynesporiosis)
Detail of leaf spots on bean: note the reddish-brown concentric patterns. <i>Corynespora cassiicola</i> (corynesporiosis)
Young fatty, blackish and elliptical lesions on bean petiole. <i>Corynespora cassiicola</i> (corynesporiosis)
Taro
The leaves of many taro plants are dotted with necrotic and chlorotic spots observed by transparency. <i>Corynespora cassiicola</i> (corynesporiosis)
Beginning lesions on taro leaf. Irregular in shape, reddish brown and necrotic, a very marked yellow halo surrounds them. <i>Corynespora cassiicola</i> (corynesporiosis)
Spots observed on the underside of a taro leaf. Necrotic and showing concentric patterns; they are duller and their yellow halo is less visible. <i>Corynespora cassiicola</i> (corynesporiosis)
Spots observed on the underside of a taro leaf. Necrotic and showing concentric patterns; they are duller and their yellow halo is less visible. <i>Corynespora cassiicola</i> (corynesporiosis)
Detail of spots on taro leaf. Their outline is irregular, concentric patterns run through them, they are surrounded by a large bright yellow halo. <i>Corynespora cassiicola</i> (corynesporiosis)
This leaf, strongly affected by corynesporiosis and often covered with confluent spots, is almost completely necrotic and dried out. <i>Corynespora cassiicola</i> (corynesporiosis)
De nombreux conidiophores noirâtres, portant chacune une conidies pluricellulaire, sont dressés à la surface de cette feuille. <i>Corynespora cassiicola</i> (corynesporiose)
Des jeunes conidies sont en cours de formation à l'extrémité de conidiophores dressés de Corynespora cassiicola. (corynesporiose)
Une jeune conidie colorée en bleu s'est formée à l'extrémité de conidiophores mélanisé de Corynespora cassiicola. (corynesporiose)
Cette conidie de Coynespora cassiicola est allongée, hyaline et présente plus de 10 pseudo-cloisons. (corynesporiose)
Aspect de conidies légèrement mélanisées. <i>Corynespora cassiicola</i> (corynesporiose)